//code to check if a value exists in an array using javascript for loop var fruits_arr = ['Apple', 'Mango', 'Grapes', 'Orange', 'Fig', 'Cherry']; function checkValue(value, arr) { var status = 'Not exist'; for (var i = 0; i < arr.length; i++) { var name = arr[...
I simply wonder if it is possible to check if "~/Folder1/Picture1.bmp" exists on the server without the ActiveX component ? Sunday, March 28, 2010 12:38 PM I know I can use C# to check it but I need to write all of this in JavaScript to be able "catch" some imageFiles that ...
// 判断目录是否存在的函数functioncheckDirectoryExists(dirPath){// 使用 fs.existsSync 检查目录if(fs.existsSync(dirPath)){console.log(`目录 "${dirPath}" 存在.`);returntrue;// 目录存在,返回 true}else{console.log(`目录 "${dirPath}" 不存在.`);returnfalse;// 目录不存在,返回 false}} 1. ...
intNULL,[localStorage]intNULL,[indexedDb]intNULL,[addBehavior]intNULL,[openDatabase]intNULL,[cpuClass]varchar(255)COLLATEChinese_PRC_CI_ASNULL,[platform]varchar(255)COLLATEChinese_PRC_CI_ASNULL,[doNotTrack]varchar(255)COLLATEChinese_PRC_CI_ASNULL,[plugins]textCOLLATEChinese_PRC_CI_ASNULL,[canvas...
constarr=[1,2,3,4,5];// Check if there is the number 3 in the arrayarr.include(3);// trueif(arr.include(3)){...}// ... Equivalent to the previous writing of indexOfarr.indexOf(3);// 2 (return its array position)// If you want to write it in the if, you must add ...
stats || stats.length <= 1) continue; // empty line // The second column has the player name var playerName = stats[1]; // Check if player exists in map if (!playerMap.has(playerName)) { // First time we see the player; Add them in! playerMap.set(playerName, []); } /...
is.url(str, regExp) Check if string str is a valid url (regExp optional).const elm = Rocket.dom.element('.element'); const filename = 'filename.json'; const time = '12:54:07'; Rocket.exists(elm); // true Rocket.has.spaces('This is a test'); // true Rocket.has.class(elm...
5.luhnCheck:银行卡号码校验(luhn算法) Luhn算法的实现,用于验证各种标识号,例如信用卡号,IMEI号,国家提供商标识号等。 与String.prototype.split('')结合使用,以获取数字数组。获得最后一个数字。实施luhn算法。如果被整除,则返回,否则返回。 const luhnCheck = num => { ...
exists allows you check check if a file exists at a given directory exists(source: string, shared: boolean, success: any, error: any) source: the filepath relative to the shared/non shared directory shared: source relative to shared or non shared success: callback called if the file exis...
The first line adds a new argument namedprop. This new argument is the name of the property we will check for the value ofstr. We usefind()instead ofindexOf()becausefind()allows us to pass a callback function. This function checks if the propertypropexists in theitemduring each iteration...